Still taken from a 3D Studio Max model showing the circular piggery in a cutaway view from the south-east, with the slates removed, from an RCAHMW digital survey of the Circular Piggery, Leighton Farm, Welshpool.

Still taken from a 3D Studio Max model showing the circular piggery in a cutaway view from the south-east, with the slates and rafters removed, from an RCAHMW digital survey of the Circular Piggery, Leighton Farm, Welshpool.

Still taken from a 3D Studio Max model showing the circular piggery in a cutaway view from the south-east, with the roof structure removed, from an RCAHMW digital survey of the Circular Piggery, Leighton Farm, Welshpool.

Still taken from the 3D Studio Max model showing the circular piggery in a cutaway view from the south-east, with the above ground structure removed to reveal the basement layout, from an RCAHMW digital survey of the Circular Piggery, Leighton Farm, Welshpool.